Lapping machine for wire drawing die compacts



May 4, 1948. P. BIEBERXCH 2,441,003

LAP PING MACHINE FOR WIRE DRAWING DIE COMPACT-5 Filed Oct. 3, 1945 4 Sheets-Sheet 1 INVENTOR'.

' M AT TOIENEY May 4, 1948. P. BIEBERICH LAP PING MACHINE FOR WIRE DRAWING DIE COMPACTS 4 Sheets-Sheet 2 Filed Oct. 3, 1945 INVENTOR. M W

7 ATTORNEY May 4, 1948. P. B'IEBERICH 3 LAPPING MACHINE. FOR WIRE DRAWING DIE COMPACTS' Filed Oct. 3, 1945 4 Sheets-Sheet 3 *2 H 32 4 W Q 13 4- m $5 mu 9 '20 w 37 3 l 1 35 i IN VEN TOR.

M ATTORNEY y 4, 1948- I P. BIEBERICH 2,441,003

LAPPING MACHINE FOR WIRE' DRAWING DIE COMPACTS Filed Oct. 3, 1945 4 Sheets-Sheet 4 INVENTOR.

WQM

ATTORNEY Patented May 4, 1943 UNITED STAT LAPPING MACHINE FOR WIRE DRAWING DIE COMPACTS,

Paul Bieberich, Fort Wayne, Ind.

Application October 3, 1945, Serial No. 619,959

10 Claims,

This invention relates to improvements in machines for lapping Wire drawing die compacts of that type in which a highly refractory die body is located in an encasement of hard metal and subsequently pierced to provide a die opening therethrough, the purpose of the invention being to afford an expedient for dressing the wall of the die body that surrounds the die opening and the walls of the corresponding openings in the encasement so the bore of the opening through the die body will be of a precise predetermined diameter through the medial portion thereof and the curvature of the ingress and egress apertures in the encasement that envelopes the body will have uniformity upon completion of the compact.

In the usual practice machines for lappin Wire drawing dies generally are provided with mounts for the die compacts that are axially alined with corresponding spindles provided with lapping tools or wires that extend axially from the spindles through the die openings in the compacts while the spindles are rotated and axially reciprocated, and the mounts are rotated upon their axes in the opposite direction to that of the spindles. In some instances reciprocating lateral swinging movement is imparted to the mounts or to the spindles concurrently with rotation thereof. 7

r In the instant invention the spindles to which the lapping tools or needles are secured have rotation, axial reciprocation, and lateral swinging reciprocal movement, and the invention pertains to the structure by which the spindles are supported and the mechanism by which the various movements of the spindles are effected.

An object of the invention is to provide a lapping machine so constructed as to afiord support for the spindles, arranged so the spindles are accurately confined in operating positions throughout their various movements, and the bearings for said spindles so arranged and connected with the actuating mechanism as to prevent binding of the spindles in their bearings.

Another object of the invention is to so construct the movable parts and supports therefor as to afford ready access to and easy observation of theoperating parts of the mechanism.

Other objects and advantages of the invention appear in the following description.

An illustrative embodiment of the invention is shown in the accompanying drawings, in which:

Fig. 1 is a perspective front elevational view of a structure in which the invention is incorp-orated;

2' s t Fig. 2 is a fragmentary front elevational view of the structure shown in Fig. 1; s I j. Fig. 3 is a vertical elevational view in section on the line 3-3' of Fig. '2 I i Fig. 4 is a similar elevational viewin sectionon the line 4-4 of Fig. 2; V V

Fig. 5 is a detail rear elevational view of one of the spindles and parts operatively-related therewith;

Fig. 6 is a verticalcross-sectional view of a compact, drawn to an .enlarged'scale, showing the form thereof uponlcompletion of the lapping operation; ,.L 1

Fig. '7 is a detail perspective view showing one of the operating fingers; and

Fig. 8 is a fragmentary perspective view of the power transmission mechanism by which the spindles and the compact supports are actuated.

The illustrative embodiment of the invention consists of a baseframe. l0 having mounted therein a horizontal shaft l I provided at one end withabelt-wheel I 2.

The base framehas two vertically extending rigid posts [3, one. adjacent-each end thereof, and

each posthas connected therewith on a, corresponding pivot l4-a strut l5. Said struts extend vertically and areconnected at .their upper .ends by cross-beams IE on correspondingpivots llso located that the struts are sustained in parallel relation with each other. A second pair of crossbeams l3 are supported in connection with the struts by corresponding pivots l9 ,loc'ated atmedial, points between the. ends of the struts so the second cross-beams are held in parallelrelationship withjthose connected withthe upper.

ends of the struts, the cross-beams and struts constituting a swinging framed Upon the posts I3 is rigidly secureda horizontal cross-beam 20 constituting a bench, and

preferably isprovided with a, shelfzl disposed along its forward edge. One end of the bench projects beyond the belt-wheel I 2 and supports an actuating lever 22 upon a pivot 23. The upper end of thelever extends between the uppermost cross-beams l6 and bears against a roller 24 that is supported on a shaft 25 between saidcross beams, and the lower end of the lever has pivoted thereon a roller 26 that bears against a cam-plate 21 mounted on the outer end face of the belt wheel l2. The cam-plate has a medial projection on its inner face constituting a fulcrum 28 that bears against the adjacent race of the wheel [2;

and the cam-plate is adjustably secured in slant ing position relative to the wheel by means of screws 29, the arrangement being suchthat upon rotation of the wheel rocking movement is imparted to the lever 22 through the medium of the cam-plate 21 and roller 26.

An anchor bar is secured to the base frame Ill and the bench 29, and extends upwardly to a point back of the upper cross-beams It. A stud 3! is secured to the rear cross-beam 16 at a point spaced suitably distant from the anchor bar, and a tension spring 32 is arranged in connection with the stud and anchor bar, whereby force is imparted to the swinging frame toward the actuating lever 22. Thus, upon rotation of the belt-wheel I2 the swinging frame is laterally reciprocated through the medium of the camplate 2'! and actuating lever 22 in opposition to the tension of the spring 32.

Rotatable mounts are provided for the support of the die compacts 33 to be lapped, each consisting of an arbor 34 provided with a beltpulley 35 and journaledin suitable stationary bearings 3-5 and 31 located respectively in the base Ill and bench 2c. The upper end of each arbor has thereon face-plate" 35 on which a die compact is centered and secured temporarily in place by any suitable means, such as wax or other adhesive material, so that upon rotation of the arbor the compact thereon is likewise rotated upon its axis.

Upon the outer faces of the cross-bars I6 are secured by means of screws. 39. anchor plates there being elongated slots 41 made in the anchor plates through which the screws extend to permitlongitudinal adjustment thereof relative to the cross-beams. Centering screws 42 arev threaded in the anchor plates with their pointed ends extending inwardly so as to engage and support corresponding spindle bearings 4'3 which have angular play about the axes of the centering screws. similar companion centering screws 44 are threaded in the lower cross-beams ill, the pointed inner ends of which support other spindle bearings 45 in alinement with the upper spindle bearings 43. In said bearings are mounted corresponding spindles 45 for rotation and axial reciprocation, each spindle being provided with a belt pulley 41. Each spindle when in medial position is disposed in axial al'inement with a corresponding one of the arbors 34.

Upon the outer end portions of the lower crossbea'ms l8 are secured brackets 48' in. which is journaled a rotatable shaft 79 having secured thereon a series of cams 50 located one adjacent each spindle, and having on one end a drivewheel 5!. The brackets 48 have mounted in their forward upturned ends a slide-shaft 52' upon which are mounted actuating fingers 53 that have tilting movement about the axis of the slide-shaft 52, and each are heldibetween a corresponding pair of collars 54' on the slide shaft by which axial play of the fingers on the ,camshaft is prevented. The inner end of each finger has a tip 55 that underlies the pulley' d'l on a corresponding one of the spindles 4'6 and engages the'l'ower face thereof. A tongue spring 55' is secured to the lower face of each finger at' its outer end and with its inner end portion overlying' and in contact with a corresponding one of the cams 50, and an adjusting. screw 51 threaded in each finger acts against the upper face of the corresponding tongua. Thus, by turning the adjusting screw the inner end of the finger is raised or lowered accordingly as the adjusting screw is turned with the effect of axially adjustingthe spindle.

grooved lug 58, and a stub-shaft 59 is secured to and extends forwardly from one of the struts 15 in a place spaced above that of the pivotal connection is for the lower cross-beams l8 and the corresponding strut l5. The outer end portion of the stub-shaft lies in the groove of the lug 58 so the sliding shaft 52 is moved longitudinally in the brackets more or less as the swinging frame moves laterally. In this manner the fingers 53 are maintained in proper alinement with the spindles.

Power transmitting mechanism The belt wheel l2, arbors 35, spindles 46 and the cam-shaft 49 are rotated continuously by any suitable source of power, preferably such as is. illustrated in Fig. 8, in which is provided a motor 60. a main drive-shaft 6! having a pulley and belt connection 52 with the motor, a countershaft 63 having a pulley and cross-belt connection B l withthe driveshaft, a pulley and belt connection 55 between the countershaft and beltwheel 1-2, and another pulley and belt connection 56 between the main drive-shaft El and camshaft 49 v The arbor pulleys 35 have connections with corresponding pulleys 61 onthe countershaft 53 by means of belts 6 8, and the spindle pulleys 41 have connections with corresponding pulleys 69 on the main drive-shaft 6| by means of belts 1D. A cross-shaft ll having idlers l2 thereon is provided to guide the belts Hi. The main driveshait, countershaft and idler shaft are supported in parallel relationship with each other by standards l'-3 that surmount the base frame H). The arrangement of the various belts is such that when the power transmitting mechanism is in operation the arbors and spindles are rotated upon their axes in relative opposite directions.

Operation In use, the compacts 33, after having been ierced are concentrically secured upon the face plates 38 of the arbors in the usual manner so the bores through. the compacts are precisely alined; therewith. Lappin tools or needles It are secured pendently in connection with the spindles 46' with their lower pointed ends initially extending into the bores in the corresponding compacts. Preferably, the needles are secured at their upper ends in positions eccentric to the axes of the spindles, whereby the needles will have gyratory movement through the bores of the compacts as the arbor and spindles are rotated oppositely and the spindles are axially reciprocated by action of the-fingers. 53 and concurrent- 1y swayed; laterally to andifro by movement of the swinging frame.

By manipulation of the adjusting screws 51 the fingers 53' are selectively tilted more or lesson the slide shaft and thecorresponding spindles adjustably raised or lowered and the needles thus accordingly projected to a lesser or greater extent into the-boresof the compacts. In this manher, when the machine is in operation, the walls of the compact are lapped by action of the needles so that, when completed, the walls surrounding the bores thereof are made t'rul'y circular in transverse section and taper axially outward from the midportion thereof, similarly as shown in Fig. 6.

Variations from the particular construction above disclosedmay be resorted to by the exercise of skill inthe art, without departure from The. slide-shaft 52' has: secured thereon a the spirit or scope of the invention.

attract WhatIclaim is: e

1. In a lapping machine for wire drawing dies, a base frame having thereon upwardly extending rigid posts, a bench supported by saidposts, upwardly extending parallel struts, pivotally supported at their lower ends one on each of said posts, cross-beams pivotally connected with said struts at the upper ends thereof, other crossbeams pivotally connected with said struts at medial points thereon, said cross-beams and struts constituting a lateral swinging frame-pivotally supported bearings arranged in pairs in connection with said cross-beams, a spindle provided with a needle and supported in each pair of bearings for rotation and axial reciprocation, an anchor bar supported by the base frame, a contracting spring connecting the anchor bar, and said swinging frame to urge movement of the swinging frame in one direction, a pivotally supported actuating lever engaging the swinging frame and provided with actuating mechanismlwhereby to urge movement of the swinging framein 0pposition to said spring, a cam shaft supported in connection with other cross-beams provided with cams and means for rotating it,: a slide-shaft in supported connection with said other cross-beams provided with a slotted lug, a'stub-shaft projecting from one of said struts located between the pivotal connections thereof with said cross-beams and engaging said lug, actuating fingers supported for tilting movement on said slide-shaft operatively connected with the corresponding spindles, there being a tongue on each finger, engaging a corresponding one of said cams, provided with an adjusting screw, compact mounts rotatably supported by the base frame and bench, one alined with each spindle, and means for rotatin said spindles and mounts in opposite directions.

2. In a lapping machine for wire drawing dies, a base frame, a laterally swinging frame pivotally mounted on said base frame, consisting of parallel side struts and parallel cross-beam members spaced apart from each other and pivotally supported on said struts, a spindle mounted in alined bearings that are pivotally supported respectively by said members, mechanism in connection with said swinging frame to actuate it, a compact mount supported on said base frame for rotation and alined with said spindle, a rotatable cam-shaft parallel with one of said members having supported connection therewith, a longitudinally slidin shaft supported in parallel relationship with the cam-shaft having a tilting finger thereon operatively connected with said spindle to impart axial movement thereto, an adjustable means on the finger engaged with a cam on said cam-shaft, a stub-shaft on one of said struts projecting from a point located between its pivotal connections with said members and engaged with the sliding shaft so as to axially reciprocate it as the swinging frame is actuated, mechanism in connection with said spindle and mount adapted to rotate same in opposite directions, and a pendant needle secured to the spindle engageable with a compact positioned on said mount.

3. A lapping machine having a base frame, a pair of vertically disposed struts having pivotal supports at their lower ends on said base frame and parallel cross-beam members spaced apart and pivotally supported on said struts, said members and struts constituting a laterally swinging frame, mechanism in connection with the frame adapted to actuate it, a rotatable mount supported on said base frame, a spindle mountedin said swinging frame for rotation and axial reciprocation alined with said mount and disposed in parallel relationship with said struts, a rotatable cam-shaft supported in connection with one of said cross-beam members, an axially sliding shaft supported in position parallel with said cam-shaft and provided with a tilting finger having connection with said spindle to move it axially as the finger is tilted,adjustable means on said finger engaging a cam on said cam-shaft whereby to tilt the finger, a connection on the swinging frame having engagement with the sliding shaft arranged to cause movement of said sliding shaft axially relative to the swinging frame whereby to maintain said finger in proper operative position with respect to said spindle, a needle secured to the spindle engageable with a compactpositioned on said mount, and means in connection with said mount and spindle adapted to rotate same.

4; In a lapping machine, a pair of parallel struts each provided with a pivotal support at one end thereof, parallel cross-beam members spaced apart from each other, each pivotally supported on said struts, said members and struts con-' stituting a laterally swinging frame, means connected with said frame to actuate it, a spindle supported in said frame between said struts and having bearings pivotally supported in said members, said spindl being adapted to have rotation, axial reciprocation and lateral swinging movement with said frame when said frame is actuated, a rotatable mount supported in axial alinement with said spindle when said spindle is in midposition, a finger having actuating engagement with said spindle mounted for tilting movement on a sliding shaft supported on said frame, means on said frame having a connection with said shaft adapted'to cause axial movement of said shaft relative to the frame as the frame is actuated, a cam-shaft mounted for rotation, there being a tongue on said finger provided with adjusting means therefor engaging a cam on said cam-shaft to cause tilting movement of said finger as the cam-shaft is actuated, a needle on said-spindle engageablewith a compact positioned on said mount, the pivotal supports for said frame tion, a mechanism supported on being located in a common plane with that of the center of the compact on said mount, and means operatively connected with said spindle and mount and connected with the actuating means for said frame arranged to cause angular rotation of said mount and spindle concurrently with the swinging movement of said frame.

5. In a lapping machine, a base, a laterally swinging frame having parallel side struts pivotally supported on said base, and parallel crossbeam members spaced apart from each other individually pivoted on said struts, a spindle disposed on the frame in bearings supported in said members for rotation and axial reciprocation, means in connection with said frame to actuate it, a rotating mount supported in axial alinement with said spindle when said spindle is in midposione of said members provided with a tilting finger and actuating means therefor and connected with the spindle to cause axial reciprocation thereof, driving means for said mechanism, a needle secured to the spindle engageable with a compact positioned on said mount, and power transmitting means in connection with a spindle and mount to rotate same.

6. In a lapping machine, a base, a laterally swinging frame having parallel side struts pivotally supported on said base and parallel cross- 7 team m mbers spa'ced ap rt froin 'a'iell other individually pivoted ofi sameness; a grass of spindles disposed 'onthe frame ie cerrespeiramg bearings pi /otally supported in said members see in parallel relationship with said "struts and with each other, adapted for rotation, axial reip'iebation and lateral swinging movement thereof with said frame, a group of rotating mounts supported so as to have axial aline'ment correspondingly with said spindles when said spindles are in midposi tion, a mechanism having supports therefor se cured on one of said cross-beam members in which is included a group of tilting fingers that engage and axially move said spindles respectively as the fingers are actuated, and a earnshaftmounted in said support leach finger has ing a member engaging a corresponding cam on said cam-shaft whereby the fingers are actuated upon rotation of the cam shaft, said spindles being adapted for attachment of needles thereto for engagement with corresponding compacts positioned onsaid mounts, actuating means for said frame; and power transmitting means to actuate said mechanism and rotate said spindles and mounts.

vthereon engaged with said spindle by wh'ieh to impart axial movement thereto, and aetiy ating means supported on said swinging frame engaging said finger. V

8. In a lapping machine, a base frame,a laterany swinging spindle-supporting frame having parallel struts pivotally supported on the base frame and cross-beam members spaced apart .v e A amalpplne w e a esteem lapping needle an a b lt is ihiimea {by tenement "rotation, sisa i''cipr tion silo rater-a1 swinging inoveirierit, ens prev-mes with ctuating fi ger mounted as tiltitig see lateral reciprocating maven -ems s'aid liege htj' in'g areuete he uses which sa d smileys-ear ria has ro'ekin moteriie'nt tire'ree's While Yet i" m. In a lapping m runs or a time having a base frame eps a smears-super mounted thereon rei lateral swirls-m a pivotally assent-ea lever the base frame engaereg seid spindle supporting trefine, and actuating mehamsm {or sets lever, said mechanism cansisting' of e iotetebre W-li e1 eiovidee with e. earnplate having adjustable "seeming mi ses therefor to hold said plate in a selected slanting eosition, the Outer face or said earn-plate hailing engagement with a roller eh sets lever whereby the lever is activated neon "rotation or said Wheel more or less .se'eordmgi as the paste is adjusted;

,7 PAUL BIEBERICH;

LIQEEEBENGES EITED r The following eierences are .of record in the p s'iA i'ss PATENTS Haniniiiin Nov. 6, i945 

